Marc Ambinder provides a good overview of the Internet revolution that Barack Obama will bring to the White House:

What Obama seems to promise is, at its outer limits, a participatory democracy in which the opportunities for participation have been radically expanded. He proposes creating a public, Google-like database of every federal dollar spent. He aims to post every piece of non-emergency legislation online for five days before he signs it so that Americans can comment. A White House blog—also with comments—would be a near certainty. Overseeing this new apparatus would be a chief technology officer.